Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git...

Pull perf/core improvements and fixes from  Arnaldo Carvalho de Melo:

New features:

  - Add option in 'perf sched' to merge like comms to lat output (Josef Bacik)

  - Improve 'perf probe' error messages when not finding a
    suitable vmlinux (Masami Hiramatsu)

Infrastructure changes:

  - Use atomic.h for various pre-existing reference counts (Arnaldo Carvalho de Melo)

  - Leg work for refcounting 'struct map' (Arnaldo Carvalho de Melo)

  - Assign default value for some pointers (Martin Liška)

  - Improve setting of gcc debug option (Martin Liška)

  - Separate the tests and tools in installation (Nam T. Nguyen)

  - Reduce number of arguments of hist_entry_iter__add() (Namhyung Kim)

  - DSO data cache fixes (Namhyung Kim)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>